Smoothed profile method for direct numerical simulations of hydrodynamically interacting particles
| Autor: | Ryoichi Yamamoto, Yasuya Nakayama, John J. Molina |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physics
Shell (structure) Reynolds number Fluid mechanics General Chemistry Function (mathematics) Mechanics Condensed Matter Physics 01 natural sciences 010305 fluids & plasmas Regular grid Physics::Fluid Dynamics symbols.namesake 0103 physical sciences symbols Particle Boundary value problem 010306 general physics Finite thickness |
| Zdroj: | Soft Matter. 17(16):4226-4253 |
| ISSN: | 1744-683X |
| Popis: | A general method is presented for computing the motions of hydrodynamically interacting particles in various kinds of host fluids for arbitrary Reynolds numbers. The method follows the standard procedure for performing direct numerical simulations (DNS) of particulate systems, where the Navier–Stokes equation must be solved consistently with the motion of the rigid particles, which defines the temporal boundary conditions to be satisfied by the Navier–Stokes equation. The smoothed profile (SP) method provides an efficient numerical scheme for coupling the continuum fluid mechanics with the dispersed moving particles, which are allowed to have arbitrary shapes. In this method, the sharp boundaries between solid particles and the host fluid are replaced with a smeared out thin shell (interfacial) region, which can be accurately resolved on a fixed Cartesian grid utilizing a SP function with a finite thickness. The accuracy of the SP method is illustrated by comparison with known exact results. In the present paper, the high degree of versatility of the SP method is demonstrated by considering several types of active and passive particle suspensions. |
| Databáze: | OpenAIRE |
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